Question

I have a JPanel containing 3 JScrollPanes(each contains a Jtable) added with a boxlayout, so I see 3 tables in a page and I load data dynamically, the code logic is almost same for 3 tables and only the column names and some cell rendering is different, For each tables I wanted to have auto scrolling to bottom of the table when new rows added to table, first 2 tables work perfect and scrollbar goes to bottom of table, but this last table’s scroll bar do weird things! I use exactly the same scrolling method for 3 tables but first 2 works this does not work!

Any ideas?

I removed some column adding code for clearity but this is the idea;

private JScrollPane fillThirdTable(ArrayList<DisplayVariable> displayList) {
    DefaultTableModel model = new DefaultTableModel();

    ToolTipTable answer = new ToolTipTable(model);

            answer.setRowHeight(60);
    answer.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
    answer.setSize(1300, 400);  
    DefaultTableCellRenderer dtcr = new DefaultTableCellRenderer();
    dtcr.setHorizontalAlignment(SwingConstants.CENTER);
    answer.getColumn("Display Variable ID").setCellRenderer(dtcr);

    JScrollPane scrollPane = null;
    for (DisplayVariable var : displayList) {

        model.addRow(new Object[] { id, shown, name, value });
        answer.setFillsViewportHeight(true);    
    }


    TableColumn c= answer.getColumnModel().getColumn(3);
    c.setCellRenderer(new MultiLineCellRenderer());

    TableColumn c2= answer.getColumnModel().getColumn(2);
    c2.setCellRenderer(new MultiLineCellRenderer());


    scrollPane = new JScrollPane(answer);
    scrollPane.setSize(1300, 400);

//here I call the method
    scrollToVisible(answer, (displayList.size()-1), 1);

    return scrollPane;

}

and this is the method for autoscrolling;

public void scrollToVisible(JTable table, int rowIndex, int vColIndex) {
    if (!(table.getParent() instanceof JViewport)) {
        return;
    }
    JViewport viewport = (JViewport)table.getParent();

    // This rectangle is relative to the table where the
    // northwest corner of cell (0,0) is always (0,0).
    Rectangle rect = table.getCellRect(rowIndex, vColIndex, true);

    // The location of the viewport relative to the table
    Point pt = viewport.getViewPosition();

    // Translate the cell location so that it is relative
    // to the view, assuming the northwest corner of the
    // view is (0,0)
    rect.setLocation(rect.x-pt.x, rect.y-pt.y);

    // Scroll the area into view
    viewport.scrollRectToVisible(rect);
}

Answer 1

I just removed the “scrollPane.setSize(1300, 400)” and it worked